1
GATE CE 2008
+2
-0.6
A pre-tensioned concrete member of section $$200\,\,mm \times 250\,\,mm$$ contains tendons of area $$500\,\,m{m^2}$$ at the centre of gravity of the section. The prestress in tendons is $$1000\,\,N/m{m^2}.$$. Assuming modular ratio as $$10,$$ the stress $$\left( {N/m{m^2}} \right)$$ in concrete is
A
$$11$$
B
$$9$$
C
$$7$$
D
$$5$$
2
GATE CE 2007
+2
-0.6
A concrete beam of rectangular cross-section of size $$120$$ $$mm$$ (width) and $$200$$ $$mm$$ (depth) is prestressed by a straight tendon to an effective force of $$150$$ $$kN$$ at an eccentricity of $$20$$ $$mm$$ (below the centroidal axis in the depth direction). The stresses at the top and bottom fibres of the section are
A
$$2.5\,\,N/m{m^2}\,\,\left( {compression} \right),\,\,10\,N/m{m^2}\,\left( {compression} \right)$$
B
$$10\,\,N/m{m^2}\,\,\left( {tension} \right),\,\,2.5\,N/m{m^2}\,\left( {compression} \right)$$
C
$$3.75\,\,N/m{m^2}\,\,\left( {tension} \right),\,\,2.75\,N/m{m^2}\,\left( {compression} \right)$$
D
$$2.75\,\,N/m{m^2}\,\,\left( {compression} \right),\,\,3.75\,N/m{m^2}\,\left( {compression} \right)$$
3
GATE CE 2005
+2
-0.6
A concrete beam of rectangular cross section of $$200\,\,mm \times 400\,\,mm$$ is pre-stressed with a force $$400$$ $$kN$$ at eccentricity $$100$$ $$mm.$$ the maximum compressive stress in the concrete is
A
$$12.5\,\,N/m{m^2}$$
B
$$7.5\,\,N/m{m^2}$$
C
$$5.0\,\,N/m{m^2}$$
D
$$2.5\,\,N/m{m^2}$$
4
GATE CE 2004
+2
-0.6
A simply supported prestressed concrete beam is $$6$$ $$m$$ long and $$300$$ $$mm$$ wide. Its gross depth is $$600$$ $$mm.$$ It is prestressed by horizontal cable tendons at a uniform eccentricity of $$100$$ $$mm.$$ The prestressing tensile force in the cable tendons is $$1000$$ $$kN$$. Neglect the self weight of beam. The maximum normal compressive stress in the beam at transfer is
A
Zero
B
$$5.55\,\,N/m{m^2}$$
C
$$11.11\,\,N/m{m^2}$$
D
$$15.68\,\,N/m{m^2}$$
GATE CE Subjects
Construction Material and Management
Geomatics Engineering Or Surveying
Engineering Mechanics
Transportation Engineering
Strength of Materials Or Solid Mechanics
Reinforced Cement Concrete
Steel Structures
Irrigation
Environmental Engineering
Engineering Mathematics
Structural Analysis
Geotechnical Engineering
Fluid Mechanics and Hydraulic Machines
General Aptitude
EXAM MAP
Joint Entrance Examination